Customize notes/instructions in checkout

[#1]

Is it possible to be able to add the ability to customize the text for the notes text box in the checkout? 

Currently, a customer can leave us a note if they have a special request for their order. 

I would like the ability to add in custom text or instructions for the customer to say something like: Please leave us special instructions for how you want your delivery to be handled, or please leave us a note if someone else if picking up your order for you.